package com.bxw.forum.interceptor;


import com.bxw.forum.config.AppConfig;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Value("${bit-forum.login.url}")
    private String LoginURL;


    /**
     *
     * 前置处理
     * 登录拦截器
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        HttpSession session = request.getSession(false);

        if(session != null && session.getAttribute(AppConfig.USER_SESSION) != null) {
            return true;
        }

        if(!LoginURL.startsWith("/")) {
            LoginURL = "/" + LoginURL;
        }
        response.sendRedirect(LoginURL);
        return false;
    }
}
